测试是否为数值型

JS

window.onload = function(){
	var isNumber = function(_number){
			return typeof _number == "number";//
		},
			_number1 = "1",
			_number2 = 1,
			_number3 = 1.22,
			_number4 = null,
			_html = "";
	_html += isNumber(_number1) ? "_number1是数值型<br />" : "_number2不是数值型<br />";
	_html += isNumber(_number2) ? "_number2是数值型<br />" : "_number2不是数值型<br />";
	_html += isNumber(_number3) ? "_number3是数值型<br />" : "_number3不是数值型<br />";
	_html += isNumber(_number4) ? "_number4是数值型<br />" : "_number4不是数值型<br />";
	document.getElementById("isNumber").innerHTML = _html;
};